自定义Dialog

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1、显示的位置：
`

Window dialogWindow = this.getWindow();       WindowManager.LayoutParams lp = dialogWindow.getAttributes(); // 获取对话框当前的参数值   dialogWindow.setGravity(Gravity.TOP|Gravity.LEFT);//显示位置

2、显示大小：

//屏幕宽度WindowManager wm = (WindowManager) getContext()        .getSystemService(Context.WINDOW_SERVICE);int width = wm.getDefaultDisplay().getWidth();int height = wm.getDefaultDisplay().getHeight();//显示大小lp.height = (int) (height * 1); // 高度设置为屏幕的0.6lp.width = (int) (width * 0.3); // 宽度设置为屏幕的0.65lp.alpha = 0.8f;dialogWindow.setAttributes(lp);

3、设置点击屏幕不消失：

this.setCanceledOnTouchOutside(false);//this是Dialog对象

4、SelectDialog代码如下：

import android.app.AlertDialog;import android.content.Context;import android.os.Bundle;import android.view.Gravity;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.Button;import android.widget.Toast;import android.view.View.OnClickListener;public class SelectDialog extends AlertDialog implements OnClickListener{    Button text_color;    Button background_color;    Button add_friend;    Button about_me;    public SelectDialog(Context context) {        super(context);    }    public SelectDialog(Context context, int theme) {         super(context,theme);     }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);            this.setContentView(R.layout.mydialog);                         setDialogSize();                    initViews();       }    private void initViews(){           text_color = (Button) findViewById(R.id.text_color);        background_color = (Button) findViewById(R.id.background_color);        add_friend = (Button) findViewById(R.id.add_friend);        about_me = (Button) findViewById(R.id.about_me);        text_color.setOnClickListener(this);        background_color.setOnClickListener(this);        add_friend.setOnClickListener(this);        about_me.setOnClickListener(this);    }    public void setDialogSize() {         //显示位置        Window dialogWindow = this.getWindow();                WindowManager.LayoutParams lp = dialogWindow.getAttributes();                dialogWindow.setGravity(Gravity.TOP|Gravity.LEFT);        //屏幕宽度        WindowManager wm = (WindowManager) getContext()                .getSystemService(Context.WINDOW_SERVICE);        int width = wm.getDefaultDisplay().getWidth();        int height = wm.getDefaultDisplay().getHeight();        //显示大小        lp.height = (int) (height * 1); // 高度设置为屏幕的0.6        lp.width = (int) (width * 0.3); // 宽度设置为屏幕的0.65        lp.alpha = 0.8f;        dialogWindow.setAttributes(lp);        this.setCanceledOnTouchOutside(false);    }    @Override    public void onClick(View v) {        switch(v.getId())        {        case R.id.text_color:            Toast.makeText(getContext(), "text_color", Toast.LENGTH_SHORT).show();            break;        case R.id.background_color:            Toast.makeText(getContext(), "background_color", Toast.LENGTH_SHORT).show();            break;        case R.id.add_friend:            Toast.makeText(getContext(), "add_friend", Toast.LENGTH_SHORT).show();            break;        case R.id.about_me :            Toast.makeText(getContext(), "about_me", Toast.LENGTH_SHORT).show();            break;            default:                Toast.makeText(getContext(), "default", Toast.LENGTH_SHORT).show();                break;        }    } }

5、MainActivity代码如下：

import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final Context context = this;        Button bt = (Button) this.findViewById(R.id.bt);        bt.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                SelectDialog dialog = new SelectDialog(context);                dialog.show();            }        });    }}

`
6、activity_main.xml代码如下：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="${relativePackage}.${activityClass}" >    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Dialog"         android:id="@+id/bt"        /></RelativeLayout>

7、mydialog.xml如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical"    android:gravity="center_horizontal"    android:background="@drawable/dialog_background"    >     <TextView         android:layout_width="wrap_content"        android:layout_height="100dp"           />    <Button         android:background="#009999ff"        android:textColor="#ffff66ff"        android:textSize="20dp"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/text_color"         android:text="字体颜色"        />    <TextView         android:layout_width="wrap_content"        android:layout_height="20dp"            />    <Button         android:background="#009999ff"        android:textColor="#ffff66ff"        android:textSize="20dp"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/background_color"         android:text="背景颜色"        />     <TextView         android:layout_width="wrap_content"        android:layout_height="20dp"            />    <Button         android:background="#009999ff"        android:textColor="#ffff66ff"        android:textSize="20dp"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/add_friend"         android:text="添加好友"        />     <TextView         android:layout_width="wrap_content"        android:layout_height="20dp"            />    <Button         android:background="#009999ff"        android:textColor="#ffff66ff"        android:textSize="20dp"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/about_me"         android:text="我的资料"        /></LinearLayout>

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